from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET

@news_blu.route('/comment_like',methods = ['POST'])
@user_login_data
def comment_like():
    '''
    评论点赞
    :return:
    '''
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户为登陆')


    comment_id = request.json.get('comment_id')
    action = request.json.get('action')
    print(comment_id,action)

    if not all([comment_id,action]):
        return jsonify(errno = RET.PARAMERR,errmsg ='参数不全')

    if action not in ["add", "remove"]:

        return jsonify(errno =RET.PARAMERR,errmsg ='参数错误')

    try:

        comment_id =int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno =RET.PARAMERR,errmsg ='参数错吴')

    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        return jsonify(errno =RET.DBERR,errmsg ='数据查询错吴')

    if not comment:
        return jsonify(errno =RET.NODATA,errmsg ='评论不存在')

    if action =='add':

        comment_like_model =CommentLike()

        comment_like_model.user_id=user.id
        comment_like_model.comment_id =comment.id
        db.session.add(comment_like_model)

        comment.like_count+=1

    else:
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id==comment.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            comment.like_count-=1
    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno =RET.DBERR,errmsg ='数据库操作失败')

    return jsonify(errno =RET.OK,errmsg ='操作成功')









@news_blu.route('/news_comment',methods =['POST'])
@user_login_data
def comment_news():
    '''
    评论新闻或者回复么跳新闻下制定的评论
    :return:
    '''
    user = g.user

    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户为登陆')

    news_id = request.json.get('news_id')
    comment_content = request.json.get('comment')
    parent_id = request.json .get('parent_id')

    if not all ([news_id,comment_content]):
        return jsonify(errno = RET.PARAMERR,errmsg ='参数不全')

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.PARAMERR,errmsg ='参数错误')
    #判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno =RET.DBERR,errmsg ='数据查询错吴')

    if not news:
        return jsonify(errno =RET.NODATA,errmsg ='未查询到新闻')


    #3 初始化评论模型，并添加一条评论

    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content

    if parent_id:
        comment.parent_id = parent_id
    try:

        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno = RET.OK,errmsg ='OK',data =comment.to_dict() )








@news_blu.route('/news_collect',methods =['POST'])
@user_login_data
def collect_news():
    '''
    收场新闻
    :return:
    '''
    #1接受参数

    user = g.user

    if not user:
        return jsonify(errno =RET.SESSIONERR,errmsg ='用户为登陆')


    news_id = request.json.get('news_id')
    action = request.json.get('action')
    #2 判断参数
    if not all([news_id,action]):
        return jsonify(errno =RET.PARAMERR,errmsg ='参数不足')

    if action not in ["collect", "cancel_collect"]:

        return jsonify(errno =RET.PARAMERR,errmsg ='参数错误')

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno =RET.PARAMERR,errmsg ='参数错吴')

    #3查询新闻，判断是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno =RET.DBERR,errmsg ='数据查询错吴')

    if not news:
        return jsonify(errno =RET.NODATA,errmsg ='未查询到新闻')

    if action =='cancel_collect':

        if news  in user.collection_news:
            # 添加到用户的新闻收场列表
            user.collection_news.remove(news)
    else:

        if news not in user.collection_news:
            #添加到用户的新闻收场列表
            user.collection_news.append(news)
    return jsonify(errno =RET.OK,errmsg ='操作成功')




@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    '''
    新闻详情
    :param news_id:
    :return:
    '''
    user = g.user
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(6)
    except Exception as e:

        current_app.logger.error(e)

    click_news_list = []

    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())
    #查询新闻数据
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        #报404错误，后续统一显示
        abort(404)

    #更新新闻的点击次数
    news.clicks += 1
    #判断是否收藏该新闻
    is_collected = False
    if user:
        if news in user.collection_news:
            is_collected = True
    comments =[]
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    #需求：查询当前用户在当前新闻里面都点赞了那些评论
    # 查看出当前新闻有所有评论，取到所有评论id

    comment_like_ids =[]
    if user:
        try:
            comment_ids = [comment.id for comment in comments]
            #再查询当前评论中那些评论被当前用户点赞
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),CommentLike.user_id ==user.id).all()

            comment_like_ids =[comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)



    comment_dict_li =[]

    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict['is_like'] =False
        if comment.id in comment_like_ids:
            comment_dict['is_like'] = True
        comment_dict_li.append(comment_dict)
    data ={
        "user_info": user.to_dict() if user else None,
        "click_news_list": click_news_list,
        'news':news.to_dict(),
        'is_collected':is_collected,
        'comments':comment_dict_li
    }
    return render_template('news/detail.html',data =data)